Siemens SIRIUS, Motor protection circuit breaker, 3RV2031-4EA15-ZX95, 30 kA at 400 V, Trip Class 10, 55 mm wide.
| Parameter | Value |
|---|---|
| Series | SIRIUS |
| Product designation | Circuit breaker |
| Frame size | S2 |
| Parameter | Value |
|---|---|
| Rated operational current (Ie) | 32 A |
| Rated voltage | 20 ... 690 V |
| Rated voltage, AC-3 (max.) | 690 V |
| Rated frequency | 50 ... 60 Hz |
| Rated insulation voltage (Ui), pollution degree 3 | 690 V |
| Rated impulse withstand voltage (Uimp) | 6 kV |
| Number of poles | 3 |
| Power loss (AC, hot) | 18 W |
| Power loss, per pole (AC, hot) | 6 W |
| Parameter | Value |
|---|---|
| Overload release setting range | 22 ... 32 A |
| Instantaneous short-circuit trip current | 416 A |
| Trip class | CLASS 10 |
| Breaking capacity at 240 V (AC) | 100 kA |
| Breaking capacity at 400 V (AC) | 65 kA |
| Breaking capacity at 500 V (AC) | 10 kA |
| Breaking capacity at 690 V (AC) | 4 kA |
| Breaking capacity at 240 V | 100 kA |
| Breaking capacity at 690 V | 2 kA |
| Short-circuit trip type | magnetic |
| Overload release type | thermal |
| Short-circuit protection | Yes |
| Phase-failure detection | Yes |
| Ground-fault detection | No |
| Auxiliary switch extendable | Yes |
| Parameter | Value |
|---|---|
| Endurance, main contacts (typ.) | 50 000 |
| Endurance, auxiliary contacts (typ.) | 50 000 |
| Switching frequency, AC-3 (max.) | 15 1/h |
| Parameter | Value |
|---|---|
| Main-circuit terminal type | screw-type terminals |
| Main-circuit connector arrangement | Top and bottom |
| Conductor cross-section, solid / stranded | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Conductor cross-section, finely stranded with ferrule | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Conductor range, AWG (main contacts) | 2x (18 ... 3), 1x (18 ... 2) |
| Parameter | Value |
|---|---|
| Height | 140 mm |
| Width | 55 mm |
| Depth | 149 mm |
| Mounting method | screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715 |
| Mounting position | any |
| Parameter | Value |
|---|---|
| Operating temperature | -20 ... +60 °C |
| Storage temperature | -50 ... +80 °C |
| Transport temperature | -50 ... +80 °C |
| Relative humidity (operation) | 10 ... 95 % |
| Max. installation altitude | 2 000 m |
| Parameter | Value |
|---|---|
| Design Of The Product | For motor protection |
It combines a thermal-magnetic overload relay and a magnetic short-circuit release in one device, sized for a 55 mm wide DIN-rail footprint.
The 55 mm width and 149 mm depth fit a standard panel layout. Any mounting position is allowed. Main contact terminals accept 2×(0.5…1.5 mm²) solid or stranded, or 2×(0.75…2.5 mm²) — no special lugs needed for typical motor-circuit wiring. Clearance: 50 mm upward and downward, 10 mm at the side, 0 mm forward and backward.
This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
It offers 30 kA at 400 V, which is the SCCR that governs fault interruption at that voltage level.
Alternative models and sibling configurations in the same Siemens series. For obsolete or discontinued parts, these models can serve as compatible replacements or functional alternatives for plant maintenance.
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